Multi-stage matrix builds

I need to execute my pipeline twice with differing environment variables.  A simplified view looks like:

ENV_VAR="A":
Build->Test->Deploy

ENV_VAR="B"
Build->Test->Deploy

It's important that the build artifacts from "A" get deployed to the "A" server and "B" gets deployed to the "B" server.  I don't see how to accomplish this with Blue Ocean because each stage can be parallel, but they pipeline then "converges" before the next stage.  I'm sure I'm approaching this the wrong way...